Use place value understanding to round whole numbers to the nearest 10 or 100.
Number and Operations in Base Ten
Use place value understanding and properties of operations to perform multi-digit arithmetic (a range of algorithms may be used).
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Describe, explore, and explain how the counting numbers 11 to 19 is:
Composed of ten ones and more ones.
Decomposed into ten ones and more ones.
Use place value understanding to round multi-digit whole numbers to any place.
10 can be thought of as a bundle of ten ones-called a “ten”.
Round two- and three-digit whole numbers to the nearest ten or hundred, respectively.